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Honestly if the money is abundant it might make sense to invest the money into some kind of flexible saving or some thing that gives promised APY but also give the safety, since we are just seeking in fulfilling basic needs, I think those APY of 5% are fine if our capital is big, but if we have small capital, trading is definitely the way to go.
it always comes down to being flexible based on our own capital and capabilities, i personally think many other also using the same strategy.
There are many kinds of platforms that provide flexible savings as you mean, Crypto or Even Non-crypto.
Exchanges like binance provide this kind of savings with an APY of around 7.22% for USDT and can be different for other coins.
For trading using small capital it is also not very effective, even it will take a long time to make a profit.
But with large capital it will be done quickly as long as you know how to do good and correct trading management and understand technical analysis.
If I had enough money, would buy some Bitcoin for the long term and potential altcoins like ETH, that would be my investment.
And to meet the needs of flexible trading and staking, it can be an original choice with sufficient knowledge, and Fiat or cash is a must-have.